Whats wrong in this


#1



https://www.codecademy.com/courses/python-beginner-en-qzsCL/1/5?curriculum_id=4f89dab3d788890003000096


It's showing type error


My logic is correct and the program should give correct output.


lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}

def average(numbers):
    total=sum(numbers)# Add your function below!
    ave =float(total)/len(numbers)
    return ave

def get_average(student):
    homework=average(student["homework"])
    quizzes=average(student["quizzes"])
    tests=average(student["tests"])
    return 0.1*homework+0.3*quizzes+0.6*tests
    
def get_letter_grade(score):
    if score>=90:
        return "A"
    elif score>=80:
        return "B"
    elif score>=70:
        return "C"
    elif score>=60:
        return "D"
    else:
        return "F"

get_letter_grade(get_average(lloyd))

def get_class_average(students):
    results=[]
    for i in students:
        results.append(get_average(i))
    return average(results)

students=['lloyd','alice','tyler']

print get_class_average(students)
print get_letter_grade(get_class_average(students))


#2

The list should contain identifiers, not string literals. The students list is a reference table to already defined objects, each a dictionary.

students = [lloyd, alice, tyler]

#3

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